Messages in this thread | | | Date | Thu, 31 Jul 2014 18:33:02 +0200 | From | Paolo Bonzini <> | Subject | Re: [PATCH 1/2] x86: AMD: mark TSC unstable on APU family 15h models 10h-1fh |
| |
Il 31/07/2014 17:47, Borislav Petkov ha scritto: > On Thu, Jul 31, 2014 at 09:47:12AM +0000, Igor Mammedov wrote: >> Due to erratum #778 from >> "Revision Guide for AMD Family 15h Models 10h-1Fh Processors, >> Publication # 48931, Issue Date: May 2013, Revision: 3.10" >> >> TSC on affected processor, a core may drift under certain conditions, >> which makes initially synchronized TSCs to become unsynchronized. > > Is this something you're seeing on a real system? If so, how do you > trigger this?
http://thread.gmane.org/gmane.linux.kernel/1748516 says that Ingo's time-warp-test fails miserably on this machine.
(The test is at http://people.redhat.com/mingo/time-warp-test/time-warp-test.c)
Paolo
| |